6 Most Dangerous Bodies of Water That Will Kill You - Page 3 of 8

Rio Tinto River, Spain

Probably anyone will think that something’s not right when a river has deep red water. Rio Tinto is a highly acidic river with a pH of 1.7 – 2.5. It’s also rich in heavy metals like gold, silver, and copper, which made it a popular river among ancient cultures throughout history. Due to 5000 years of mining pollution, the river became an extreme environment, breeding chemolithotrophic organisms such as iron-oxidizing bacteria and sulfur-oxidizing bacteria. The river originates in the Sierra Morena mountains of Andalusia.